1 /* $NetBSD: ufs_bswap.h,v 1.13 2003/10/05 17:48:50 bouyer Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 5 * 6 * Copyright (c) 1998 Manuel Bouyer. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _UFS_UFS_BSWAP_H_ 32 #define _UFS_UFS_BSWAP_H_ 33 34 #if defined(_KERNEL_OPT) 35 #include "opt_ffs.h" 36 #endif 37 38 #include <sys/endian.h> 39 40 #include "makefs.h" 41 42 /* Macros to access UFS flags */ 43 #ifdef FFS_EI 44 #define UFS_MPNEEDSWAP(mp) (VFSTOUFS(mp)->um_flags & UFS_NEEDSWAP) 45 #define UFS_FSNEEDSWAP(fs) ((fs)->fs_flags & FS_SWAPPED) 46 #define UFS_IPNEEDSWAP(ip) UFS_MPNEEDSWAP(ITOV(ip)->v_mount) 47 #else 48 #define UFS_MPNEEDSWAP(mp) (0) 49 #define UFS_FSNEEDSWAP(fs) (0) 50 #define UFS_IPNEEDSWAP(ip) (0) 51 #endif 52 53 #if !defined(_KERNEL) || defined(FFS_EI) 54 /* inlines for access to swapped data */ 55 static __inline u_int16_t 56 ufs_rw16(u_int16_t a, int ns) 57 { 58 return ((ns) ? bswap16(a) : (a)); 59 } 60 static __inline u_int32_t 61 ufs_rw32(u_int32_t a, int ns) 62 { 63 return ((ns) ? bswap32(a) : (a)); 64 } 65 static __inline u_int64_t 66 ufs_rw64(u_int64_t a, int ns) 67 { 68 return ((ns) ? bswap64(a) : (a)); 69 } 70 #else 71 #define ufs_rw16(a, ns) ((uint16_t)(a)) 72 #define ufs_rw32(a, ns) ((uint32_t)(a)) 73 #define ufs_rw64(a, ns) ((uint64_t)(a)) 74 #endif 75 76 #define ufs_add16(a, b, ns) \ 77 (a) = ufs_rw16(ufs_rw16((a), (ns)) + (b), (ns)) 78 #define ufs_add32(a, b, ns) \ 79 (a) = ufs_rw32(ufs_rw32((a), (ns)) + (b), (ns)) 80 #define ufs_add64(a, b, ns) \ 81 (a) = ufs_rw64(ufs_rw64((a), (ns)) + (b), (ns)) 82 83 #endif /* !_UFS_UFS_BSWAP_H_ */ 84